Power-transmitting device



W. J. FRANCKE. Po'wER TRANSMITHNG DEVICE.

APPLICATION FILED JAN. I7 1920.

w. 1. FRANCKE. POWER IRANSMITTING DEVICE.

APPLICATION FILED IAN. I7' 1920.

1,398,773. r Patented 1\Iw'.'29,1921.

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v l Afro/Mfrs W. I. FRANCKE.

POWER TRANsMlTTING nEvlcE.

APPLICATION FILED IAN. I7, i920.

, Patllted NOV. 29, 1921.

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WILLIAM J'. FRANCKE, 0F HIGHLAND PARK, NEW JERSEY, ASSIGNOR TO THE FRANCKE C0., OF HIGHLAND PARK, NEW JERSEY, .A CORPORATION 0F NEW- JERSEY.

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POWER-TRANSMITTING nnvion.

Specification of Letters Patent. latnted Ngvo 29, :1921

j .Application ined January 1v, 1920. serial No. 352,175.

To all whom 'it 'may concer/i- Be it known that WliLLiAiii J'. FnANoitE, a citizen of the United States, and a resident of Highland Park, in the county of Middlesex and State of NewJersey, have invented a new and Improved Power-Transmitting Device, of which the following is a full, clear, and exact description The object of the invention is to provide a new andv improved power transmitting device more especially designed for transmitting power by angularly disposed shafts.

Another object is to compensate for the non-circular path and the irregular angular advanceof one couplingv -member relative to the otherfcoupling -member to insure a continuous regular driving ot' the driven transmission shaft from a uniformly driven driving or motor shaft.

With these and other objects in view, the invention consists of certain novel features of construction as hereinafter shown and described-and then specifically pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this speciii'cation, in which similar characters of reference indi cate corresponding parts in all the views.

Figure 1 is a longitudinal central section of the power tiansmittiiig device;

Fig. 2 is a sectional plan view of part of' the same on the line2-2 of Fig. l; I

Fig.' 3 is a, transverse section of the -same on the line 3-3 of'Fig. 1;' i

Fig. 4 isa diagrammatic view\of the power transmitting device;

Fig. 5 is a longitudinal central section .of a modified form of the power transmitting device oii the liiiiiof Fig. G;

Fig. G is a cross section of the same on the line G-G of Fig. 5; y!

Fig. 7 is a sectional side elevation of a portion of the same on the line' 7-7 oi' Fig. G;

Fig. S is a reduced face view oi one oi the coupling disks ol' the ball and socket joint;

Fig. 9 is a diagrammatic view oi' the power transmit-ting device illustrated in Figs. 5, 6, 7 and 8.

Then connecting two angularly disposed shafts by a ball and socket joint or other universal coupling, one of the joint members travels in a non-circular path rela-tive'to the other ioint member, and an irregular angular advance takes place in one joint member relative to the other thus producing an irregular transmission of power and a loss of power. With they .improvements presently described in detail, the above mentioned defects are compensated for to insure a continl uous regular driving of the driven transmission shaft from a uniformly driven driving or motor shaft.

As illustrated in Fig. l, the motor or driving shaft'l() and the driven shaft 11 are' connected with each other by a universal joint 12, preferably of the ball and socket type, of which the ball 13 is fastened by keys 14 to the ,motor or drivingr shaft 10 and the socket 15 has its hub 16 slidingl connected with the polygonal end 17 of tle driven shaft 11. A nut 19 screws on the if;

duced' threaded inner end 2() ofi-the motor shaft 10 and abuts against a shoulder 2l formed on the ball 13 to hold the latter against accidental longitudinal movement on the motor or driving shaft 10.

The. ball and socket members 13 and 15 of the universal joint 12 are connected with each other by a flexible coupling tomeompensate foi' the non-circular path and the irregular angular advance of one coupling member relative to the other. This flexible cou'- pling is arranged as follows:I In the ball 13 of the universal joint 12 are held the inner ends oi radially disposed bunches of iiexible shims 25 having their outer orfree ends extending into openings 26 formed in slides 27 'mounted to slide sidewise in pivots 28 mounted to turn in the socket 15 with the axes of the pivots 28 disposed radially and hence at a right angle'to the line of movement oi the slides 2T in the said pivots. The

side walls oi thef slides 27 are made convex, j

as plainly shown in Fig. 1, and Kthe outer ends ot' the bunches of shims 5 have their corners rounded oii' to permit ofan easy sliding movement of the slides 27 relative to the outer ends of the bunches of shims 25.,

From the foregoing it will be seen that "by the arrangement described the joint niembers 13 and 15 of the universal coupling are movable one relative to the other on a common center. and the said members are iiexibly connected with each other by the radially disposed bunches of shims 25, the slides 27 and the pivots-28.

In practice, the socket 15 is prefe ably made in two parts fastened together by bolts 29 to permit of conveniently assembling the llmembers constituting the flexible coupling employed for connecting the ball 13 with the socket 15. Y

In order to protect the power transmitting device from dust and other extraneous matter use is made of a spherical hood formed of two parts 410 and 41, of which the part 40 is secured to the motor casing 12 .While the' other part 41- is preferably at tached to a slee-ve 43 held on the hub 16 of the'socket member 15. By reference to the diagrammatic views shown in Fig. L1 and Fig. 4, it will be noticed that the non-cir cular or elliptical path of one coupling member relative to the other is compensated for and likewise the irregular angular advance of one coupling member relative to the other, and hence the driven shaft 11 receives a continuous regular, uniform driving from the motor or driving shaft 10. The explanation of this is as follows, special reference being had to Fig. 4: The vertical line al-m re )resents the plane in which the driving s aft 10 revolves', and the line y/-y at an angle to and intersecting the line at the center W represents the plane in which the driven shaft 11 revolves, and it will be noticed that l'relative to the'plane the periphery of the plane i/-g/ describes an ellipse.V The value of the depression of the circlel to form the ellipse is indicated at Z. It will be noted that the elliptical travel of the driven shaft 11 forces the slides 27 (shown in full lines in Fig. 4) to take the position shown by the broken lines and which position they can -only assume on bending of the shims, and

the amount of bending or. vdeflection is shown by the full lineQ/4 drawn from B as the center. The shims. 25 in the two points below the center line at 15 degrees bend the same vamount but in an opposite direction.

ri When :the shims 25 are in the position N (northr), S (south), E (east) and W (West) then they remain unchanged by the angularity of the shafts 10 and 11, owing to thesliding actidn of the shims at the points N and Sand theturning of the slides 27 at ,the points W and E. The bend in the shims 25 at the points NW and SE tends to move the socket member 12 forward in the direction of drive with relation'to the ball member 13, and the bends inthe shims 25at the points SW and NE tend to move the. socket member 12 backward and hencethese forces balance each othen'-- No angular chmige-Of rotative position of one coupling member 13 relative to the .other member 15 is caused by the angularity of the shafts 10 and 11 nor by the ellipse caused by the angularity.

When the ball member 13 oves in the direction of the arrow to drive he socket member 15 then the shims 25 at the points N, Si, E and W bend. as shown by the broken line H, and the slides 2'? turn to adapt themselves correspondinggrly, as shown by the renews the shims 25 are clearly bent by the angularity of the shaft, and the driving power Iis. also doubled at these two points.v The bend of the shims 25 shown by the line A at the points NE and SV straightensfout and the driving power at these points-becomes neutral.

The change in angular advance caused by' the elliptical travel of the periphery of the coupling member 13 relative to the other coupling member 15 is compensated for at points N and S by sliding one of the shims 25, at points E and `W by the turning of the slides 27 and at the four points NW, NE, SE and SW by the bending of the shims 25, it being understood that the bending above the center of the coupling is in an opposite direcforces balancing each other, thereby causing no change in the angular advance.

With a constant load the two coupling members 13 and 15 have al uniform angular advance and with a variable load the nonuniformity of the angular advance is limited to the amount of the bend of the shims 25 in transmitting the load.

In the modified form shown in Figs. 5 to 8, the motor or driving shaft50 and the driven shaft 51 are connected with each other by a universal oint 52, the members of which are connected with each other bya flexible coupling 53 to compensate for the non-circular pathv and the irregular angular advance of one joint member relative to the other. The universal joint 52 is in the form of apball and socket joint arranged as follows: On the ad- 'jacent ends of the shafts 50 and 51 are secured hubs 60, 61 of spherical or ball members 62, 63 having outwardly extending ianges 64, 65 'to which are fastened the flanges 66, 67 of disks 68, 69 bythe use of bolts 70 or other fastening means. In the flanges 611, 66 are mounted to turn radiallyi into openings 85, 86 formed in 'fianges 87, 88

extending outwardly from 'socket members 89, SQ fitting on the spherical or ball mem bers 62, 63. The flanges 87, 86 of th'e'socket members 89, 90 are provided with rims 91,

9o tion to the bending below vthe center, the two 94 in position with a view to hold the socket neeting at points points c,-c and 5,5" bend to compensate foi" Vmembers 62, 63 in the socket members 89 and 96 in place on the ball mem# bers 62, 63. The bolts 97 pass loosely through large openingsV 98 formed in the flanges 64,66 and 65, 67 (see Figs. 6 and 8) to allow independent movement of the ball members 89,' 90. From the foregoing it will be seen that by the arrangement described the flexiblecon necting members 80 flexibly connect the' ball members 62, 63 with the socket members 89, 90 thus compensating for-the non-circular path of one point member relative to the other and likewise for the irregular angular advance of one joint member relative to the other. The explanation of this is as fol` lows, special reference being had to Fig. 9

At the points a., a. and e, e the shims 8 0 are straight and not bent, due to the angle of the shafts 50 and 5l, because the shims 8O are held at each end in the housing formed by the socket members 89 and 90 and the lla'nges`64, 66 and 65, 67 are close to thehousing and hence the shims are not liable `to bend. Both the housing and the two flanges turn on the center f due to the ball and socket construction, 8O at the points b, b, c, c', al, ri". directions shown. The perip flanges 65, 67 describes the circle g. With reference to the llanges, 67. the flanges 64, 66 .describe the ellipse h. While th` point e moves to d, the point b moves to a where the ."o bend in the advance for the distance traveled is uniform, but while the point e moved to ai on the line ai, the point e moved only to den the dotted line of the ellipse h, with the shims 80 cona", d', bending to compensate for the shorter line of the ellipse with the angular advance remaining constant. In a. like manner, the shims .80 connecting the the shorter peripheral travel, andduring the second half of the revolution bend for the longer peripheral travel. ln the diagram thebend of the shims at b, b appears greater. than it is, dueto being projected from the 45 angle position. The true bend of this bunch of shims 80 is 'shown in the projection at the top of the diagram.

Having thusI described my invention, I claim as new and desire to secure by Letters Patent: j

1. A power transmitting device, comprising a universal joint having joint-members lmovable one upon the other on a common center, a flexible coupling member carried by one of the joint members, and pivotally mounted means carried by 4pivot and this forces the shimsl hwy of the shims 80 are straight and hence the angular the other joint member and connected with .they flexible member so as to bend the latter.

2. A power transmitting device, comprising a universal joint having 4joint members movable one on the other on a common een- 3. A power transmitting device, comprise ter, a radially disposed fle'xible coupling member secured at one end joint members,

in one of the a slide engaged by the free end ofI the said flexible coupling meinber,

and a 'pivot mounted to turn in the other' si i joint member and in which the said slide `is movably mounted.

4. A power transmitting device, compris- I ing a universal j'oint having joint members movable one'on the other on a common ycenter,I a radially disposed' flexiblev coupling` member'seeured at one end in one of the joint members, a slide engaged bythe `free end of the saidV coupling member, and a mounted to turn in the. other Ajoint member and 'in which the said slide iszmovably mounted, he said .pivot having' its axis disposed Aradially and 'at' a` right angle Ito the movement ofthe said slide in the pivot.

5. A powertransmitting device, compris- 'ing a dri "ng shaft, a driven shaft at an angle tothe said driving shaft, a ball and socket joint coupling member disposed radially andlliav ing its inner end secured in the bally of the said joint, a pivot mounted to turn. in the said socket member of the joint and having its axis disposed. radially, and a slide m`ounted to slide in the said pivot at an angle to the axis thereof, the said slide being engaged by the outer end of the said .flexible coupling member.

6., A power inga driving shaft, a driven shaft at an angle to the said socket joint connecting Vthe adjacent ends of the said shafts with each other, a flexible coupling member disposed radially and having its inner end secured in the ball of the said socket member of the joint and having the axis thereof, the said slide having an opening therethrough and the outer -end of 'the flexible coupling member slidingly extending through the sai'l slideopcning.

i/viiiiziiiiu Jg. rnANcKn.

connecting the adjacent ends 'of the said shafts with each other, a flexible driving shaft, a' ball and said joint, a pivot mounted ,to turnin the 

